Roll-in T Slot Nut for aluminum profile can be directly inserted into any assembly connection point in the profile groove. The spring steel ball on the back can fix the position of the elastic nut in the profile groove. It is very convenient and reliable to use. It is also the most widely used in the assembly process of aluminum profile frame. 1. More than 4 years of experience in export services 2. If there is any problem at all we pick up the order from wherever you are, And we'll get it corrected for you right away. At no extra charge ! 3. We will make sure : after sales service can be almost as important as the initial purchase. Let you have a better buying experience.